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<head>
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    <title>Document</title>
</head>
<body>
    
    <div id="test"></div>
    <script src="../lib/react.development.js"></script>
    <!-- //引入核心库 -->
    <script src="../lib//react-dom.development.js"></script>
    <!-- //支持react的dom操作 -->
    <script src="../lib/babel.min.js"></script>
    <script type="text/babel"> 
    //1.创建函数式组件
    function MyComponent(){
        //此处的this是undifined,因为babel编译之后开启了严格模式
        return <h2>我是用函数组件定义的组件</h2>
    }
    ReactDOM.render(<MyComponent/>,document.getElementById('test'))
    </script>
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